// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
#pragma once

#include <pollux/core/plan_node.h>

namespace kumo::pollux::core {
    /// Generates unique sequential plan node IDs starting with zero or specified
    /// value.
    class PlanNodeIdGenerator {
    public:
        explicit PlanNodeIdGenerator(int startId = 0) : nextId_{startId} {
        }

        PlanNodeId next() {
            return fmt::format("{}", nextId_++);
        }

        void reset(int startId = 0) {
            nextId_ = startId;
        }

    private:
        int nextId_;
    };
} // namespace kumo::pollux::core
